Valves are just " communicating doors" that, when open, allow blood to pass through, and when closed, hold blood within a chamber.

瓣膜就像“交通门”一样，打开时，允许血流入；关上时，把血储存在腔室内。

Bond hurled himself out of bed and through the bathroom, but the communicating door was locked.

邦德从床上跳起来， 穿过浴室，但连通门是锁着的。

Then I wiped the scowl off my face and got up to open the communicating door into my waiting room.

皱着眉头。 然后我擦去脸上的怒容， 起身打开通往候诊室的门。